초록 ▼

An apparatus and method for automatically updating a threshold in a fuzzy pattern comparator. A bit-field of an input data is simultaneously compared to simultaneously-input data patterns. An accumulated distance value is obtained for each data pattern, and the accumulated distance values are simult

An apparatus and method for automatically updating a threshold in a fuzzy pattern comparator. A bit-field of an input data is simultaneously compared to simultaneously-input data patterns. An accumulated distance value is obtained for each data pattern, and the accumulated distance values are simultaneously compared with each other and a threshold to determine a minimum. The comparison is performed by a multipath feed-forward network which starts with the most significant bit and determines on a bit-by-bit basis and identifies which of the accumulated distance values and the threshold are a minimum. The threshold value is automatically updated to the minimum value during the comparison process if it is determined the threshold value is not a minimum. The automatic update threshold function is effective in pattern recognition systems which require periodic adaptation or adjustment in response to slowly changing pattern conditions.

대표청구항 ▼

A pattern comparator comprising: means for simultaneously comparing a serial input signal to at least one pattern data signal, the comparing means simultaneously outputting at least one accumulated distance signal representing an accumulated difference between said serial input signal and said at le

A pattern comparator comprising: means for simultaneously comparing a serial input signal to at least one pattern data signal, the comparing means simultaneously outputting at least one accumulated distance signal representing an accumulated difference between said serial input signal and said at least one pattern data signal; means for determining whether said at least one accumulated distance signal is an optimum value relative to a threshold, said determining means outputting a threshold win signal when said at least one accumulated distance signal is not equal to said threshold; and means for storing said threshold, said storing means updating said threshold with said optimum value in response to said threshold win signal and when said at least one accumulated distance signal is an optimum value relative to said threshold.